Rolling mill



J- R. GEORGE ROLLING MILL Filed Jan. 31 1930 In 0' antoR- Jerome. YLGQQT Q Patented Nov. 17, 1931' PATENT OFFICE JEROME R. GEORGE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR MORGAN CON STRUCTION COMPANY, OF 'WORCIEIS'IER, MASSACHUSETTS, A CORPORATION OF I MASSACHUSETTS RoLLrnq MILL of selection in the use of the various stands of rolls. a

The above and other objects and advantages of the invention are fully set forth in the following detaileddescription thereof,

5 reference being had in this connection to the accompanying drawing, whose single figure is a diagrammatic plan view of rolling mill apparatus invention.'.-

Referring to said drawing, the preliminary reduction of the stock, as received from a heating furnace, not shown, is preferably eifectedin a roughing mill consisting asihere shown of fourstands of reducing rolls 1, 2,

3, 4, in tandem relation. Substantially in the line of delivery from said roughing train are arranged certain intermediate and finishing roll stands, here designated byv the numerals 5, and 6, 7, respectively, These last three stands are spaced apart from each other and a from the roughing train 1, 2, 3,- 4-to provide for open rolling, that is,so that the full length of a piece .of stock can be delivered from any of said roll stands before its'firs't end is received in the succeeding stand of rolls. As shown, however, the roll stands 3 and 4 of the roughing train are arranged in juxtaposition for continuous, as distinso guished from open rolling. The several alined stands .of roughing, intermediate and finishing rolls, as above described, constitute for certain purposes a complete rolling mill,

- the product of which, as shown, may b e delivered directlyby the usual runout 8 to a flying shear 9 adapted to sever said product intopredeterminedlengths, prior to its deliveryonto a cooling bed or other redeiving device 10. Preferably, all of saidalined stands of rolls are driven through suitable gearing 11,

arranged in accordance with the 11 from a single motor or other prime mover 12. A

According to the invention, I arrange between the intermediate roll stand 5 and the finishing roll stand 6 a broadside transfer mechanism 13 of any well-known construc tion, the latter adapted to intercept the rolled product when desired before its entrance to the finishing rolls 6 and to deliver it broadside to a longitudinal conveying mechanism 14 whose rollers in this case run in the opposite direction from the conveyor rollers that support the stock between the roll stands 5 and 6. Said conveying mechanism 14 delivers the stock to an offset stand of rolls 15 that is opposite to the previously described stands of'rolls, preferably by suitable gearing 16 5, and thence through the successive finishing stands 6 and 7 to the cooling bed 10. By this arrangement, two additional passes, over and above the number of passes provided by the alined stands-of rolls as first described, are obtained, namely, the pass between the stand ere shown as driven in a direction from the 'same motor or other prime mover L of rolls 15, and the repassing through the f stand of rolls 5. Thus, the rolling in this case is accomplished by a four-stand roughing mill, a three-stand intermediate mill, and a two-stand finishing mill,"'mak1ng nine stands in all. The above described diversion of the stock to the oifset stand of rolls 15, and its-ensuing repassage through the stand of rolls '5 can be repeated, in the rolling of a given product, as often as may be deslred; )each time it is done, the number of passes given to the stock is increased by two. Furthermore,these extra passes can be utilized,

by the above described arrangement, without traversing the stock longitudinally through a greater distance than the minimum required for open rolling.

According to the invention, instead of returning the stock after passing through the provides the usual means, in the forming of clusiv e) .or an eight-stand mill (the stands 1,

stand of rolls to its original line of delivery, the broadside transfer mechanism 17 may be rendered inoperative, and in this case the said stock, asrun out on conveyor rollers 18, is presented longitudinally .to a single stand of rolls 19, which constitutes part of another finishing mill, here shown as a staggered duo mill consisting of four stands of separated rolls- 19, 20, 21'and- 22, of which the rolls 19 and 21 are operated in the same direction as the rolls 15, while the rolls 2O thisstaggered duo finishing train, the stockand 22 are operated in the same direction as the alined stands of rolls 1 to 7 inclusive.

Preferably, the stands of rolls 19 and 20 are. driven by suitable gearing 23 and 24 respec tively from the same motor 12 which operates the previously described roll stands, while the stands of rolls 21 and 22 are preferably driven from the independent motors 25 and 26 respectively. In the operation of as delivered from the roll stand 19 is received on a Y-transfer conveying mechanism 27 of well known construction which of reversible skewed conveyor rollers 28, 28 for alining the stock with the next roll stand 20 of said finishing train, and for presenting thereto that end of the stock which lastfemerged from the rolls 19; a similar Y- t'ransfer conveying mechanism29 is interposed between the stands of rolls 20 and 21 of the finishing mill and a third Y-transfer conveying mechanism 39 islikewise interposed between the stands of rolls 21 and.-

' 22 of said finishing mill. From the rolls 22,

a suitable runout 31' is adapted to deliver the stock to a cooling bed 32 of any desired construction. With this arrangement, uti- ,lizing the staggered duo finishing train 19,

' 20, 21 and 22, the rolling is accomplished by four stand roughing mill, a two-stand infat rolls '5 and 15 and thereby constitutes an termediate mill, and a four stand finishing mill making in all, a ten-stand combination- Furthermore, according to the invention,

thebroadside transfer mechanism 17 may, if desired, be operated in a direction opposite to that previously described, whereby it will intercept the stock as delivered by the rough- \ing train 1, 2, 3, 4, and-transfer it broadside to the conveyor rollers 18, the latter, as befbre, serving for delivery of said stockto the staggered duo finishing mill 19, 20, 21 and 22. This mode of operation cuts out from the passage of the stock, the'two stands of eight-stand arrangement, as distinguished from the ten-stand arrangement described immediately above. N

Thus, by the arrangement above described, assuming the alined stands of rolls to be seven in number as shown, I have provided for the stockscomplete reduction either in a seven-stand mill (the alined stands 1 to 7 in- 2, 3, 4, 19, 20, 21 and 22) or a nine-stand mill (the stands 1, 2, 3, 4, 5, 15, 5, 6 and 7) or a ten: stand mill (the stands 1, 2,3, 4, 5', 15, 19, 20,21 and 22). This selectivity asregards the total number of stands permits the efiicient rolling of agreat variety of sections; the

alined stand mill arrangement, for example, is well suited for large angle, fiat and round sections, while the other mill arrangements are well adapted for agreat variety of smaller sections of angles, flats androunds.

In addition to the above described varia tions, and those provided by repeated diversions through the stands 5 and 15, the stock, .upon emergence fromvstand 15 may if deanother finishing train comprising roll stands in tandem arrangement, disposed insubstantial alinement with said roughing train and spaced apart therefrom, a series of intermediate. roll stands common to both of said 'finishing trains, one of said intermediate stands being. substantially alined with and interposed between said roughing train and said 9- second-mentioned finishing train and means selectivelyoperable in the passage of the stock from said roughing train to either of said finishing trains for making as many passes through said intermediate stands as {1 may be required.

ICE

2. In a rolling mill, a series of stands of I rolls in substantial alinement, comprising a plurality of stands of roughing rolls, a stand of finishing rolls, with provisiomfor open rolling between the roughing and the intermediate stands, iifcombmation with a group of additional finishing stands at one side of said substantially alined stands, means for broadsiding the stock as delivered by said intermediate roll stand, to aline it with the first stand. of said additional finishing rolls, a second stand of intermediate rolls preceding said first stand of additional finishing rolls,'means for passing the stock so broad sided repeatedly through the first and second stands of intermediate rolls, and means selectively op-- erable to finish the stock so broadsided in said additional finishing rolls, or in the firsti mentioned finishing rolls of said mill.

3. In a rolling mill, the combination with a train of alined roughing roll stands, of a stand of finishing rolls insubstantial alinement with said roughing rolls and spaced ill;

of intermediate rolls and a plurality of stands stands, arranged at one side of and immedi- Q therefrom, an offset finishing roll traincomprising a. plurality of pairs of staggered roll ately adjacentto said roughing train, two

stands of intermediate rolls 01 operation on the stock between said roughing rolls and the first-mentioned and second-mentioned finishing roll stands, one of said intermediate stands being .lined with said roughing stands 7 and the other being alined with the first stand of said offset finishing roll train, and means selectively operable todirect the stock delivered by the'said second intermediate standeither back to the first intermediate stand, or to the first finishing stand of said ofiset finishing train, onto an intermediate finishing. stand of said ofiset finishing train.

, JEROME GEORGE. 

